CN114717669B - Nanofiber yarn and continuous yarn forming method thereof - Google Patents
Nanofiber yarn and continuous yarn forming method thereof Download PDFInfo
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- CN114717669B CN114717669B CN202210328444.2A CN202210328444A CN114717669B CN 114717669 B CN114717669 B CN 114717669B CN 202210328444 A CN202210328444 A CN 202210328444A CN 114717669 B CN114717669 B CN 114717669B
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D5/00—Formation of filaments, threads, or the like
- D01D5/0007—Electro-spinning
- D01D5/0061—Electro-spinning characterised by the electro-spinning apparatus
- D01D5/0076—Electro-spinning characterised by the electro-spinning apparatus characterised by the collecting device, e.g. drum, wheel, endless belt, plate or grid
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D5/00—Formation of filaments, threads, or the like
- D01D5/0007—Electro-spinning
- D01D5/0061—Electro-spinning characterised by the electro-spinning apparatus
- D01D5/0092—Electro-spinning characterised by the electro-spinning apparatus characterised by the electrical field, e.g. combined with a magnetic fields, using biased or alternating fields
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D7/00—Collecting the newly-spun products
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01H—SPINNING OR TWISTING
- D01H7/00—Spinning or twisting arrangements
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- D—TEXTILES; PAPER
- D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
- D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
- D02G3/00—Yarns or threads, e.g. fancy yarns; Processes or apparatus for the production thereof, not otherwise provided for
- D02G3/02—Yarns or threads characterised by the material or by the materials from which they are made
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- D—TEXTILES; PAPER
- D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B2331/00—Fibres made from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polycondensation products
- D10B2331/30—Fibres made from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polycondensation products polycondensation products not covered by indexing codes D10B2331/02 - D10B2331/14
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
- Y02P70/62—Manufacturing or production processes characterised by the final manufactured product related technologies for production or treatment of textile or flexible materials or products thereof, including footwear
Abstract
The invention discloses a nanofiber yarn and a continuous yarn forming method thereof, wherein the continuous yarn forming method comprises the following steps: spinning the nanofiber by adopting an electrostatic spinning method, so that the spun nanofiber is split into n parts under the action of n electric field forces in the motion process; collecting each corresponding nanofiber independently by adopting a plurality of bundling guide wheels which can rotate respectively, and enabling each nanofiber to be oriented and drawn under the action of the bundling guide wheels to form a nanofiber aggregation body attached to the bundling guide wheels; a continuous nanofiber bundle is formed from the corresponding nanofiber aggregation body under the action of external force, and each nanofiber bundle is mixed and twisted after being independently subjected to preliminary twisting to obtain nanofiber yarns.
Description
Technical Field
The invention belongs to the technical field of textile, and particularly relates to nanofiber yarn and a continuous yarn forming method thereof.
Background
With the rise of nanotechnology, after the 80 th century of 20 th, the electrostatic spinning technology capable of spinning nano-fibers has received a great deal of attention, and the forming principle of electrostatic spinning is that charged polymer solution or melt flows and deforms in an electrostatic field, when repulsive force between droplets with the same charge is greater than surface tension, the droplets can be separated from each other and deform to form a cone shape, and after the solution evaporates or the solvent cools, three-dimensional disordered droplets are collected to obtain nano-fibers. The diameter of the fiber obtained by electrostatic spinning is obviously smaller than that of the fiber obtained by a conventional mode, the characteristic of the fiber also enables a single fiber to have larger specific surface area and adsorption capacity, the nonwoven material produced by the electrostatic spinning technology can be applied to the fields of high-precision electronic devices, filtering protective materials and the like, and in biomedical engineering, the nanofiber structure formed by electrostatic spinning can also basically meet the requirements of a tissue engineering bracket. However, the nanoscale size also causes the problems that the mechanical properties of the electrostatic spinning fiber are far worse than those of the traditional short fiber and filament, abrasion is easy to occur in the spinning and yarn forming processes, the forming is difficult to be performed and the like, and meanwhile, the yarn forming process of the nanofiber is basically intermittent operation at present, so that the continuous production is difficult.
Disclosure of Invention
The invention aims to solve the technical problems of overcoming the defects in the prior art and providing a novel production method of nanofiber yarns, which not only can realize continuous production, but also can ensure that the produced nanofiber yarns can maximally retain various excellent properties of nanofibers without other fiber yarn forming, and simultaneously solve the problems of easy generation of hairiness, poor mechanical strength and the like in the yarn forming process of the conventional nanofiber.
The invention also provides the nanofiber yarn produced by the method.
In order to solve the technical problems, the invention adopts the following technical scheme: a continuous yarn forming method of nanofiber yarn, comprising the steps of:
spinning the nanofiber by adopting an electrostatic spinning method, so that the spun nanofiber is split into n parts under the action of n electric field forces in the motion process, wherein n is an integer greater than or equal to 2;
collecting each corresponding nanofiber independently by adopting a plurality of bundling guide wheels capable of rotating respectively, and enabling each nanofiber to be oriented and drawn under the action of the bundling guide wheels to form a nanofiber aggregate attached to the bundling guide wheels;
and under the action of external force, a continuous nanofiber bundle is formed in the nanofiber aggregation body on each bundling guide wheel, and after independent preliminary twisting, the nanofiber bundles are mixed and twisted to continuously obtain nanofiber yarns.
According to some preferred aspects of the invention, the electrospinning method uses a single needle spinning needle to perform electrospinning, and each electric field force is formed between the single needle and each bundling guide wheel.
According to some preferred aspects of the invention, the electric field force is in an adjustable form capable of being adjusted by the magnitude of the voltage difference between the single needle spinning needle and each of the cluster guide wheels and/or the distance between the single needle spinning needle and each of the cluster guide wheels.
According to some preferred and specific aspects of the present invention, the centers of the bundling guide wheels are coplanar and parallel to a horizontal plane, the extension line of the outlet direction of the single-needle spinning needle is perpendicular to the horizontal plane, and the distance between the outlet of the single-needle spinning needle and the plane formed by the centers of the bundling guide wheels is controlled to be 10-30cm.
According to some preferred aspects of the invention, the bunched guide wheel comprises an insulating sleeve capable of rotating along the axis of the bunched guide wheel and a conductive metal ring wound on the insulating sleeve, and the nanofiber aggregate is attached to the outer side of the conductive metal ring.
According to some preferred and specific aspects of the invention, the radius of the conductive metal ring is 3-10cm.
According to some preferred aspects of the invention, the preliminary twisting employs a primary twist work roll and the mixed twisting employs a mixed twist work roll;
the continuous yarn forming method further comprises the steps of respectively and independently controlling by adopting a control system:
the rotational speed and the temperature of each bundling guide wheel;
twist and temperature of each primary twisting working roller;
twist and temperature of the mixed twisting working roll;
each of said electric field forces.
According to some preferred aspects of the invention, the continuous yarn forming process is carried out using a continuous production apparatus as follows:
the continuous production device comprises an electrostatic spinning mechanism, a plurality of bundling guide wheels, a plurality of scrapers, a plurality of primary twisting working rolls, a mixed twisting working roll, a yarn continuous collection assembly and a plurality of pressurizing power supplies which are sequentially arranged; the electrostatic spinning mechanism is electrically connected with the positive electrode of one pressurizing power supply, each bundling guide wheel is respectively and independently electrically connected with the negative electrode of one pressurizing power supply, and the number of the scrapers is in one-to-one correspondence with the bundling guide wheels and is arranged at the side of the bundling guide wheels;
the electrostatic spinning mechanism comprises a single-needle spinning needle head for spinning the nano fibers;
the bunching guide wheel comprises an insulating sleeve which can rotate along the axis of the bunching guide wheel and a conductive metal ring wound on the insulating sleeve;
in the production process, an electric field force is formed between each bundling guide wheel and the electrostatic spinning mechanism, the nanofibers spun by the single needle spinning needle heads are split into n parts under the action of the electric field force and move towards the corresponding bundling guide wheels to be attached to the outer sides of the conductive metal rings to form nanofiber aggregation bodies, then in the rotating process of the bundling guide wheels, a continuous nanofiber bundle is formed from the nanofiber aggregation bodies on the corresponding bundling guide wheels under the action of each scraper, and after the nanofiber bundles are subjected to preliminary twisting independently through the corresponding primary twisting working rollers, the mixed twisting working rollers are used for mixing twisting to continuously obtain nanofiber yarns, and the nanofiber yarns are collected by the yarn continuous collecting assembly.
According to some preferred aspects of the present invention, the continuous production apparatus further comprises a control system, wherein the control system is respectively in communication connection with the electrostatic spinning mechanism, the plurality of bundling guide wheels, the plurality of first twist working rolls, the mixing twist working rolls, the yarn continuous collection assembly and the plurality of pressurized power sources.
The invention provides another technical scheme that: a nanofiber yarn produced by the continuous yarn forming method of nanofiber yarn.
Due to the adoption of the technical scheme, compared with the prior art, the invention has the following advantages:
in the invention, other electric field force is innovatively introduced in the electrostatic spinning process, so that spun nanofibers can be split into multiple parts, the spun nanofibers can be more tightly entangled in the bundling guide wheel under the action of the electric field force, a certain orientation and draft can be obtained through the rotating bundling guide wheel, a nanofiber aggregation body attached to the bundling guide wheel is formed, then the nanofibers are bundled under the action of external force, the nanofibers are mixed and twisted after being independently twisted to obtain nanofiber yarns, the continuous production of nanofiber yarns is realized in the process, the subcomponents forming the nanofiber yarns can be independently controlled before the mixed and twisted, and further different properties can be given to the subcomponents, so that the yarn after the mixed and twisted has special properties, for example, better elastic recovery rate can be given to the yarns.
Drawings
FIG. 1 is a schematic structural view of a continuous production apparatus used in a continuous yarn forming method of nanofiber yarn according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a cluster guide wheel according to an embodiment of the present invention;
FIG. 3 is a schematic illustration of the spin distance in an embodiment of the invention;
FIG. 4 is a schematic view of the nanofiber yarn according to example 5 of the present invention in different states;
FIG. 5 is a schematic illustration of arch camber height in an embodiment of the present invention;
wherein, 1, the propulsion assembly; 2. a reservoir injector; 3. a single needle spinning needle head; 4a/4b/4c, a pressurized power source; 5a/5b, doctor blade; 6a/6b, bundling guide wheels; 6-1, insulating sleeve; 6-2, conducting copper strips; 7a/7b, a first twist work roll; 8. a mixing and twisting working roll; 9. a yarn continuous collection assembly; h1, spinning distance; h2, arch height.
Detailed Description
The above-described aspects are further described below in conjunction with specific embodiments; it should be understood that these embodiments are provided to illustrate the basic principles, main features and advantages of the present invention, and that the present invention is not limited by the scope of the following embodiments; the implementation conditions employed in the examples may be further adjusted according to specific requirements, and the implementation conditions not specified are generally those in routine experiments.
In the following, unless otherwise specified, all starting materials are essentially commercially available or prepared by methods conventional in the art.
Example 1
The present example provides a nanofiber yarn and a continuous yarn forming method thereof. The starting material used in this example was Polysulfone (PSF) particles (available from Dongguan, chuan Australia engineering plastics materials Co., ltd., trade name: P-1710).
In this example, the continuous yarn forming method includes the steps of: spinning the nanofiber by adopting an electrostatic spinning method, so that the spun nanofiber is split into 2 parts under the action of 2 electric field forces in the motion process;
further, an electrostatic spinning solution used for electrostatic spinning is prepared by the following method: 10g of Polysulfone (PSF) particles are dissolved in 90g of dimethylacetamide (DMAc) to obtain a mixed solution, the mixed solution is put into a magnet, the magnet is placed into a container for sealing treatment and is placed into a water bath kettle for high-temperature heating, the temperature of the water bath kettle is 80 ℃, the heating time is 2 hours, after the heating is finished, the solution is taken out and kept stand for 0.5 hour, and the transparent and uniform solution with the mass fraction of 10wt% is obtained, namely the electrostatic spinning stock solution.
Meanwhile, in the example, the electrostatic spinning method adopts a single-needle spinning needle head to carry out electrostatic spinning, the spinning parameter is controlled at 10kV, the aperture of a nozzle is 0.5mm, the flow rate of a solution is 2mL/h, the ambient temperature is 25 ℃, and the relative air humidity is 65%.
2 bundling guide wheels which can rotate respectively are adopted to independently collect each corresponding nanofiber, and each nanofiber is oriented and drafted under the action of the bundling guide wheels to form a nanofiber aggregation body attached to the bundling guide wheels;
under the action of external force, a continuous nanofiber bundle is formed from the nanofiber aggregation body on each bundling guide wheel, and after independent preliminary twisting, the nanofiber bundles are mixed and twisted to continuously obtain nanofiber yarns.
In this example, each electric field force is formed between the single needle and each bundling guide wheel, the electric field force is an adjustable electric field force which can be adjusted by the voltage difference between the single needle spinning needle and each bundling guide wheel and/or the distance between the single needle spinning needle and each bundling guide wheel, the centers of the bundling guide wheels are coplanar and parallel to the horizontal plane, the extension line of the outlet direction of the single needle spinning needle is perpendicular to the horizontal plane, and the spinning distance between the planes formed by the outlet of the single needle spinning needle and the centers of the bundling guide wheels is controlled to be 20cm. Further, the bunching guide wheels comprise insulating sleeves capable of rotating along the axis of the bunching guide wheels and conductive metal rings wound on the insulating sleeves, the nanofiber aggregates are attached to the outer sides of the conductive metal rings, the radius of the conductive metal rings is 5cm, the rotating speeds of the 2 bunching guide wheels are 200r/min, and the applied voltage is-10 kV.
In the example, the preliminary twisting adopts a primary twisting working roll, and the mixed twisting adopts a mixed twisting working roll;
the continuous yarn forming method further comprises the steps of respectively and independently controlling by adopting a control system: the rotational speed and temperature of each bundling guide wheel; twist and temperature of each primary twisting working roller; twist and temperature of the twist work roll; each of said electric field forces. Further, in this example, the twist of the 2 first twist working rolls was controlled to be 600T/m, wherein the temperature of one first twist working roll was 120 ℃, the temperature of the other first twist working roll was 180 ℃, the twist temperature of the mixed twist working roll was 120 ℃, and the twist was 800T/m.
The above-described continuous production method of the present invention will be further described with reference to the accompanying drawings.
Specifically, as shown in fig. 1 to 3, the continuous yarn forming method of this example is carried out using the following continuous production apparatus:
the continuous production device comprises an electrostatic spinning mechanism, 2 bundling guide wheels (respectively arranged on the left side and the right side in the example, respectively marked by 6a and 6b in fig. 1), 2 scrapers (respectively marked by 5a and 5b in the example ), 2 primary twisting working rollers (respectively marked by 7a and 7b in the example, respectively marked by 7a and 7b in the example), a mixed twisting working roller 8 and a yarn continuous collection assembly 9, and a plurality of pressurizing power supplies (3 in the example, respectively marked by 4a, 4b and 4c in the example), wherein the electrostatic spinning mechanism is electrically connected with the positive electrode of one pressurizing power supply, and the 2 bundling guide wheels are respectively and independently electrically connected with the negative electrode of one pressurizing power supply; the scraper is arranged at the side of the bundling guide wheel;
the electrostatic spinning mechanism comprises a propulsion component 1 for adjusting the outflow speed of the electrostatic spinning solution, a liquid storage injector 2 for conducting the electrostatic spinning solution, and a single-needle spinning needle head 3 for spinning the nanofiber and communicated with the liquid storage injector 2;
as shown in fig. 2, the structure diagram of the bunching guide wheel is exemplarily shown, and the bunching guide wheel comprises an insulating sleeve 6-1 capable of rotating along the axis of the bunching guide wheel and a conductive metal ring (copper is adopted in this example, a conductive copper bar 6-2 is made) wound on the insulating sleeve 6-1;
in this example, the centers of the 2 bundling guide wheels are coplanar and parallel to the horizontal plane, the extension line of the outlet direction of the single-needle spinning needle head is perpendicular to the horizontal plane, and the spinning distance h1 between planes formed by the outlets of the single-needle spinning needle head and the centers of the bundling guide wheels is controlled to be 20cm.
In the production process, an electric field force is formed between each bundling guide wheel and the electrostatic spinning mechanism, the nanofibers spun by the single needle spinning needle head are split into n parts under the action of the electric field force and move towards the corresponding bundling guide wheels, then are attached to the outer side of the conductive metal ring in the rotation process of the bundling guide wheels, and obtain certain orientation and draft to form nanofiber aggregates, then a continuous nanofiber bundle is formed from the nanofiber aggregates on the corresponding bundling guide wheels under the action of each scraper in the rotation process of the bundling guide wheels, and after preliminary twisting is carried out on each nanofiber bundle independently through the corresponding primary twisting working roller, the mixed twisting working roller 8 carries out mixed twisting to continuously obtain nanofiber yarns, and the nanofiber yarns are collected by the yarn continuous collecting assembly 9.
Further, the continuous production device also comprises a control system which is respectively in communication connection with the electrostatic spinning mechanism, the 2 bundling guide wheels, the 2 primary twisting working rolls, the mixed twisting working rolls, the yarn continuous collection assembly and the 3 pressurizing power supplies, and further can control the operation parameters of all the components according to a preset program or data input in real time.
The device of the embodiment realizes the conversion from loose nanofiber bundles to spinnable nanofiber yarns, the strength of the yarns is further improved, the continuous running of the nanofiber spinning process is realized, and the surface hairiness is improved.
Comparative example 1
The uniform electrostatic spinning dope prepared in example 1 was spun under the same spinning conditions, and collected by a single cluster guide wheel, which was identical to the working parameters in example 1, to prepare a control sample 1.
Example 2
This example provides a nanofiber yarn and a continuous yarn forming method thereof, which are basically the same as in example 1, and differ only in that:
(1) The electrostatic spinning solution is obtained by the following method: dissolving 10g of degummed silk fibroin (SF, purchased from Beijing Yongkangle science and technology development Co., ltd., brand: SP 110) powder in 90g of Hexafluoropropanol (HFIP) to obtain a mixed solution, placing the mixed solution into a magnet, sealing the mixed solution in a container, heating the sealed solution in a water bath kettle at 40 ℃ for 5 hours, taking out the heated solution and standing the heated solution for 1 hour to obtain a transparent uniform solution with the mass fraction of 10 wt%;
(2) Electrostatic spinning conditions: the voltage is 20kV, the aperture of a nozzle is 0.4mm, the flow rate of the solution is 0.5mL/h, and the spinning distance h1 is 25cm;
(3) The temperature of the 2 primary twisting working rolls is 30 ℃, and the twisting temperature of the mixed twisting working rolls is 20 ℃.
Comparative example 2
The uniform electrostatic spinning dope prepared in example 2 was spun under the same spinning conditions, and collected by a single cluster guide wheel, which was identical to the working parameters in example 2, to prepare a control sample 2.
Example 3
This example provides a nanofiber yarn and a continuous yarn forming method thereof, which are basically the same as in example 1, and differ only in that:
(1) The electrostatic spinning solution is obtained by the following method: 10g of polyacrylonitrile (PAN, purchased from Shanghai Ala Latin Biochemical technology Co., ltd., brand name: P303197) powder is dissolved in 90g of Dimethylformamide (DMF) to obtain a mixed solution, the mixed solution is put into a magnet, the mixed solution is placed into a container for sealing treatment and is placed into a water bath for high-temperature heating, the temperature of the water bath is 70 ℃, the heating time is 5 hours, and after the heating is finished, the mixed solution is taken out and kept stand for 1 hour, so that a transparent and uniform solution with the mass fraction of 10wt% is obtained;
(2) Electrostatic spinning conditions: the aperture of the nozzle is 0.4mm;
(3) The rotating speed of the left bundling guide wheel is 200r/min, and the radius of the conductive metal ring is 5cm;
the rotating speed of the right bundling guide wheel is 100r/min, and the radius of the conductive metal ring is 10cm;
(4) The temperature of the 2 primary twisting working rolls is 50 ℃;
(5) The twisting temperature of the mixing and twisting working roller is 60 ℃.
Comparative example 3
The uniform electrostatic spinning dope prepared in example 3 was spun under the same spinning conditions, and collected by a single cluster guide wheel, which was identical to the working parameters in example 3, to prepare a control sample 3.
Example 4
This example provides a nanofiber yarn and a continuous yarn forming method thereof, which are basically the same as in example 3, and differ only in that:
(1) The rotating speed of the left bundling guide wheel is 300r/min, the radius of the conductive metal ring is 5cm, and the guide wheel is heated to 80 ℃;
the rotating speed of the right bundling guide wheel is 100r/min, and the radius of the conductive metal ring is 15cm;
(2) The twisting temperature of the mixing and twisting working roller is 70 ℃.
Example 5
This example provides a nanofiber yarn and a continuous yarn forming method thereof, which are basically the same as in example 3, and differ only in that:
(1) The rotating speed of the left bundling guide wheel is 200r/min, the radius of the conductive metal ring is 5cm, and the guide wheel is heated to 60 ℃;
the rotating speed of the right bundling guide wheel is 150r/min, the radius of the conductive metal ring is 10cm, and the guide wheel is heated to 50 ℃;
(2) The pre-twisting degree of the left side primary twisting working roller is 600T/m, the pre-twisting degree of the right side primary twisting working roller is 800T/m, and the temperature of the 2 primary twisting working rollers is 50 ℃;
(3) The draft multiple of the yarn between the primary twist working roll and the mixed twist working roll is controlled to be 1.5 times, the twisting temperature of the mixed twist working roll is controlled to be 70 ℃, and the twist is controlled to be 500T/m.
In this example, the yarn on the right side has a larger yarn diameter due to the slower bundling speed in the bundling process, so that the yarn is helped to bear higher multiple winding in the first twisting area, after the drafted yarn on the right side and the yarn on the left side are combined in the second twisting area, the yarn can be driven to twist, the shrinkage change of the yarn on the left side with low multiple speed is larger than that of the yarn on the right side, the schematic structural diagram of the prepared nanofiber yarn in the stretching and loosening states is shown in fig. 4, and the arching height h2 of one of the yarn components in the loosening state is shown in fig. 5.
Example 6
This example provides a nanofiber yarn and continuous yarn forming method thereof, which is basically the same as that of example 5, and is only different in that:
(1) The pre-twisting degree of the left side primary twisting working roller is 800T/m, and the pre-twisting degree of the right side primary twisting working roller is 1000T/m;
(2) The draft multiple of the yarn between the primary twist working roll and the mixed twist working roll is controlled to be 1.2 times, and the twist of the mixed twist working roll is controlled to be 600T/m.
Performance testing
The yarns obtained in examples 1-4 and comparative examples 1-3 were subjected to the following performance tests, the specific results of which are shown in Table 1.
TABLE 1
The yarns obtained in examples 3, 5-6 were subjected to the following performance tests, the specific results of which are shown in Table 2.
TABLE 2
The above embodiments are only for illustrating the technical concept and features of the present invention, and are intended to enable those skilled in the art to understand the present invention and to implement the same, but are not intended to limit the scope of the present invention, and all equivalent changes or modifications made according to the spirit of the present invention should be included in the scope of the present invention.
Claims (7)
1. A continuous yarn forming method of nanofiber yarn, characterized in that the continuous yarn forming method comprises the following steps:
spinning the nanofiber by adopting an electrostatic spinning method, so that the spun nanofiber is split into n parts under the action of n electric field forces in the motion process, wherein n is an integer greater than or equal to 2;
collecting each corresponding nanofiber independently by adopting a plurality of bundling guide wheels capable of rotating respectively, and enabling each nanofiber to be oriented and drawn under the action of the bundling guide wheels to form a nanofiber aggregate attached to the bundling guide wheels;
under the action of external force, a continuous nanofiber bundle is formed in the nanofiber aggregation body on each bundling guide wheel, and after independent preliminary twisting, the nanofiber bundles are mixed and twisted to continuously obtain nanofiber yarns;
the electrostatic spinning method adopts a single-needle spinning needle to carry out electrostatic spinning, and each electric field force is respectively formed between the single-needle spinning needle and each bundling guide wheel; the electric field force is in an adjustable form and can be adjusted by the voltage difference between the single-needle spinning needle head and each bundling guide wheel and/or the distance between the single-needle spinning needle head and each bundling guide wheel;
the bundling guide wheel comprises an insulating sleeve capable of rotating along the axis of the bundling guide wheel and a conductive metal ring wound on the insulating sleeve, and the nanofiber aggregation body is attached to the outer side of the conductive metal ring.
2. The continuous yarn forming method of nanofiber yarn according to claim 1, wherein the center of each bundling guide wheel is coplanar and parallel to a horizontal plane, the extension line of the outlet direction of the single needle spinning needle is perpendicular to the horizontal plane, and the distance between the outlet of the single needle spinning needle and the plane formed by the center of each bundling guide wheel is controlled to be 10-30cm.
3. The continuous yarn forming method of nanofiber yarn according to claim 1, wherein the radius of the conductive metal ring is 3-10cm.
4. The continuous yarn forming method of nanofiber yarn according to claim 1, wherein the preliminary twisting adopts a primary twisting working roll, and the mixed twisting adopts a mixed twisting working roll;
the continuous yarn forming method further comprises the steps of respectively and independently controlling by adopting a control system:
the rotational speed and the temperature of each bundling guide wheel;
twist and temperature of each primary twisting working roller;
twist and temperature of the mixed twisting working roll;
each of said electric field forces.
5. The continuous yarn forming method of nanofiber yarn according to claim 1, characterized in that the continuous yarn forming method is carried out by adopting the following continuous production device:
the continuous production device comprises an electrostatic spinning mechanism, a plurality of bundling guide wheels, a plurality of scrapers, a plurality of primary twisting working rolls, a mixed twisting working roll, a yarn continuous collection assembly and a plurality of pressurizing power supplies which are sequentially arranged; the electrostatic spinning mechanism is electrically connected with the positive electrode of one pressurizing power supply, each bundling guide wheel is respectively and independently electrically connected with the negative electrode of one pressurizing power supply, and the number of the scrapers is in one-to-one correspondence with the bundling guide wheels and is arranged at the side of the bundling guide wheels;
the electrostatic spinning mechanism comprises a single-needle spinning needle head for spinning the nano fibers;
the bunching guide wheel comprises an insulating sleeve which can rotate along the axis of the bunching guide wheel and a conductive metal ring wound on the insulating sleeve;
in the production process, an electric field force is formed between each bundling guide wheel and the electrostatic spinning mechanism, the nanofibers spun by the single needle spinning needle heads are split into n parts under the action of the electric field force and move towards the corresponding bundling guide wheels to be attached to the outer sides of the conductive metal rings to form nanofiber aggregation bodies, then in the rotating process of the bundling guide wheels, a continuous nanofiber bundle is formed from the nanofiber aggregation bodies on the corresponding bundling guide wheels under the action of each scraper, and after the nanofiber bundles are subjected to preliminary twisting independently through the corresponding primary twisting working rollers, the mixed twisting working rollers are used for mixing twisting to continuously obtain nanofiber yarns, and the nanofiber yarns are collected by the yarn continuous collecting assembly.
6. The continuous yarn forming method as in claim 5, wherein said continuous production device further comprises a control system, said control system being in communication with said electrospinning mechanism, said plurality of cluster guide wheels, said plurality of primary twist work rolls, said mix twist work rolls, said yarn continuous collection assembly, and said plurality of pressurized power sources, respectively.
7. A nanofiber yarn produced by the continuous yarn forming method of nanofiber yarn according to any one of claims 1-6.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210328444.2A CN114717669B (en) | 2022-03-30 | 2022-03-30 | Nanofiber yarn and continuous yarn forming method thereof |
| PCT/CN2023/084398 WO2023185849A1 (en) | 2022-03-30 | 2023-03-28 | Nanofiber yarn and continuous yarn forming method therefor |
Applications Claiming Priority (1)
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| CN114717669A (en) | 2022-07-08 |
| WO2023185849A1 (en) | 2023-10-05 |
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